9.1.8 Cell-to-Cell Offload Support for ASM-Scoped Security

To perform cell-to-cell offload operations efficiently, storage servers need to access other storage servers directly, instead of through a database server.

If you have configured ASM-scoped security in your Exadata environment, you need to set up cell keys to ensure storage servers can authenticate themselves to other storage servers so that they can communicate with each other directly. This applies to Oracle ASM resync, resilver, rebuild and rebalance operations, and database high-throughput write operations